These will be my first purchase for my car. These in fact are very important for the car and work in conjunction with the rear spoiler. They assist in bringing the *** end down during high speeds. In addition, assist in higher top end speed and better high speed handling.

This is per, the head MB Engineers who worked on the crossfire team. This is why Startech adds them, but they also added a piece to them as well as two more retractable wings that work conjunction with the current wing and a new front lip with a wind diffuser to allow for them to obtain optimum drag co efficiency and handling.

I posted an in depth article that talks about this with the MB guys. The article stated the car's top speed was limited due to these inefficiencies and this was their solution.

I want to get a set before you can't anymore...